CN111020319B - Special wire for additive manufacturing of high-strength aluminum-copper alloy, and preparation method and application thereof - Google Patents
Special wire for additive manufacturing of high-strength aluminum-copper alloy, and preparation method and application thereof Download PDFInfo
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- CN111020319B CN111020319B CN201911213384.4A CN201911213384A CN111020319B CN 111020319 B CN111020319 B CN 111020319B CN 201911213384 A CN201911213384 A CN 201911213384A CN 111020319 B CN111020319 B CN 111020319B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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Abstract
The invention belongs to the technical field of aluminum alloy additive manufacturing materials, and particularly relates to a high-strength wire special for aluminum-copper alloy additive manufacturing, and a preparation method and application thereof. The invention provides a high-strength aluminum-copper alloy additive manufacturing special wire which comprises the following chemical components in percentage by mass: 6.3 to 6.8 percent of Cu, 0.3 to 0.4 percent of Mn, 0.3 to 0.4 percent of Ti, 0.3 to 0.4 percent of Zr, less than or equal to 0.10 percent of Si, less than or equal to 0.15 percent of Fe and the balance of Al. The embodiment shows that compared with the traditional wire, the interlayer tissue of the additive manufacturing molded piece prepared by using the special wire is uniform and has smaller difference and good mechanical property.
Description
Technical Field
The invention relates to the technical field of aluminum alloy additive manufacturing materials, in particular to a high-strength wire special for aluminum-copper alloy additive manufacturing, and a preparation method and application thereof.
Background
The rapid development of aerospace technology has brought about more demanding aerospace manufacturing standards. Since the new type of aircraft equipment is required to have low cost and high reliability, the parts thereof are required to be large-sized and integrated. The additive manufacturing technology is not limited by a mould, and can directly form integrated complex parts, further optimize the structure of the parts of the aviation equipment at the present stage, and realize the simple structure and high performance of the parts.
The aluminum-copper alloy belongs to 2xxx series alloys, and the Cu plays a role in solid solution strengthening, so that the series alloys have extremely high room-temperature mechanical properties and high-temperature mechanical properties, and are the highest-strength aluminum alloys in various types, and therefore, the aluminum-copper alloy is widely applied to the aviation field, such as a liquid fuel storage tank of a carrier rocket, a fuselage of an airplane, a compressor wheel of an aeroengine, a wheel disc and the like. At present, the aluminum-copper alloy prepared by using an additive manufacturing technology has the problems that the grain structure of a formed part is coarse, and the mechanical property cannot meet the requirements of parts of aviation equipment, so that the development of the aluminum-copper alloy additive manufacturing technology is limited.
At present, the wire manufactured by the high-strength aluminum-copper alloy arc additive manufacturing mainly uses ER2319 commercial wire used in the welding process and SAlCu wire formulated according to the national standard GB/T10858-1989. Their chemical composition ranges are as follows: (weight percentage) Cu 5.8% -6.5%, Mn 0.2% -0.4%, Ti 0.1% -0.2%, Zr 0.1% -0.25%, V0.05% -0.15%, Si is less than or equal to 0.20%, Fe is less than or equal to 0.30%, and the balance is Al. JYBai et al used ER2319 welding wire to perform GTA arc additive manufacturing on 2219 aluminum alloy, and analyzed the structure and performance of the additive sample. The result shows that the internal structure of the deposition layer is uneven, the crystal grains are gradually fine along the direction of the deposition height, and the tensile strength of the 2219 aluminum alloy in the deposition state is only 239 MPa. Zewu Qi et Al point out that the performance of Al-6.3Cu alloy manufactured by single-wire arc additive manufacturing can not meet the use requirements, establish a double-wire and arc additive manufacturing system, adopt two welding wires of ER2319 and ER5087 as forming materials, and prepare the deposition Al-Cu-Mg alloy with different components by adjusting the wire feeding speed. The result shows that the Al-Cu-Mg alloy microstructure mainly comprises coarse columnar grains and fine isometric grains, the grain size distribution is not uniform, and the tensile strength of the additive sample is 280 +/-5 MPa. CraigABrace et al by NASA of USA adopts 2139 welding wires to perform electron beam fuse deposition additive manufacturing tests, obtains additive samples with good compactness performance by controlling electron beam process parameters, and the tensile strength of the deposited samples is less than 290 MPa. Gu J L et al used ER2319 welding wire to study the CMT additive manufacturing 2219 aluminum alloy, and compared the structures and mechanical properties of the deposition state, the deposition-aging state and the deposition-rolling-aging state, found that the deposited crystal grains are coarse and the structure is uneven, and the performance of the deposited sample is 280 MPa; the grain size of the as-deposited state is unchanged, but the strength is significantly improved; the grains in the deposition-rolling-aging state are obviously refined, the strength is close to that in the deposition-aging state, and meanwhile, the plasticity is further improved. Therefore, the deposited aluminum-copper alloy prepared by the existing welding wire has uneven structure, coarser grain structure and lower performance of the additive test sample, so that measures are needed to improve the performance of the deposited aluminum-copper alloy additive test sample.
Disclosure of Invention
The invention aims to provide a high-strength wire special for additive manufacturing of aluminum-copper alloy, and a preparation method and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a high-strength wire special for aluminum-copper alloy additive manufacturing, which comprises the following chemical components in percentage by mass: 6.3 to 6.8 percent of Cu, 0.3 to 0.4 percent of Mn, 0.3 to 0.4 percent of Ti, 0.3 to 0.4 percent of Zr, less than or equal to 0.10 percent of Si, less than or equal to 0.15 percent of Fe and the balance of Al.
Preferably, the diameter of the high-strength aluminum-copper alloy additive manufacturing special wire is 0.8-1.6 mm.
The invention provides a preparation method of the high-strength aluminum-copper alloy additive manufacturing special wire material, which comprises the following steps:
mixing raw materials corresponding to the chemical components, and sequentially smelting and casting to obtain a cast ingot;
carrying out homogenization treatment and hot extrusion on the cast ingot in sequence to obtain an extruded material;
and drawing the extruded material to obtain the high-strength wire special for the additive manufacturing of the aluminum-copper alloy.
Preferably, the raw materials comprise an aluminum-copper intermediate alloy, an aluminum-manganese intermediate alloy, an aluminum-zirconium intermediate alloy, an aluminum-titanium intermediate alloy and a pure aluminum preparation alloy.
Preferably, the smelting comprises primary smelting and refining which are sequentially carried out, wherein the primary smelting temperature is 750-760 ℃, and the time is 30-35 min; the refining temperature is 760-780 ℃, and the refining time is 10-20 min.
Preferably, the casting temperature is 720-740 ℃.
Preferably, the homogenization treatment temperature is 520-550 ℃, and the heat preservation time is 14-17 h.
Preferably, the temperature of the hot extrusion is 380-430 ℃, and the time is 1-2 h;
the diameter of the extruded material is 6-8 mm, and the deformation coefficient of the extruded material is 10-50.
Preferably, the drawing mode is multi-pass drawing, and the drawing times are 10-20 times.
The invention provides application of the special wire for additive manufacturing of the high-strength aluminum-copper alloy in the technical scheme in the additive manufacturing of the high-strength aluminum-copper alloy through electric arcs.
The invention provides a high-strength wire special for aluminum-copper alloy additive manufacturing, which comprises the following chemical components in percentage by mass: 6.3 to 6.8 percent of Cu, 0.3 to 0.4 percent of Mn, 0.3 to 0.4 percent of Ti, 0.3 to 0.4 percent of Zr, less than or equal to 0.10 percent of Si, less than or equal to 0.15 percent of Fe and the balance of Al. The invention adds Ti, Zr and other grain refining elements into the wire material simultaneously, and the Ti and the Zr respectively form Al with Al in the deposition-state aluminum-copper alloy3Ti、Al3The high-melting-point particles such as Zr are used as cores of heterogeneous nucleation in the solidification process of the additive metal, so that the formation of isometric crystals is promoted, the structure of the aluminum-copper alloy in a deposition state is refined, and the mechanical property of the aluminum-copper alloy additive sample can be improved. The embodiment shows that compared with the traditional wire, the interlayer tissue of the additive manufacturing molded piece prepared by using the special wire is uniform and has smaller difference and good mechanical property.
Drawings
FIG. 1 is a schematic drawing of a tensile specimen sampling of the additive molded articles prepared in examples 1 to 3 and comparative example.
Detailed Description
The invention provides a high-strength wire special for aluminum-copper alloy additive manufacturing, which comprises the following chemical components in percentage by mass: 6.3-6.8% of Cu, 0.3-0.4% of Mn, 0.3-0.4% of Ti, 0.3-0.4% of ZrC, less than or equal to 0.10% of Si, less than or equal to 0.15% of Fe and the balance of Al.
In the invention, the high-strength aluminum-copper alloy additive manufacturing special tool is prepared by mass percentThe wire used comprises 6.3-6.8% of Cu, preferably 6.4-6.6% and more preferably 6.5%. In the present invention, when the content of Cu element in the aluminum-copper alloy is controlled to the above-mentioned content, CuA1 precipitated by aging2Has obvious strengthening effect and good strengthening effect.
In the invention, the high-strength aluminum-copper alloy additive manufacturing special wire comprises, by mass, 0.3-0.4% of Mn, preferably 0.32-0.36%, and more preferably 0.33-0.35%. In the invention, Mn element can prevent the recrystallization process of the aluminum-copper alloy, improve the recrystallization temperature and obviously refine recrystallized grains.
In the invention, the high-strength aluminum-copper alloy additive manufacturing special wire comprises, by mass, 0.3-0.4% of Ti, preferably 0.32-0.35%, and more preferably 0.33-0.34%.
In the invention, the high-strength aluminum-copper alloy additive manufacturing special wire comprises, by mass, 0.3-0.4% of Zr, preferably 0.32-0.36%, and more preferably 0.33-0.35%.
The invention adds Ti, Zr and other grain refining elements into the wire material simultaneously, and respectively forms Al with Al in the deposition-state aluminum-copper alloy3Ti、Al3Zr and other high-melting-point particles are used as cores of heterogeneous nucleation in the solidification process of the additive metal, so that the formation of isometric crystals is promoted, the structure of the deposited aluminum-copper alloy is refined, and the mechanical property of the aluminum-copper alloy additive sample is improved.
According to the invention, the high-strength aluminum-copper alloy additive manufacturing special wire comprises, by mass, not more than 0.1% of Si, not more than 0.15% of Fe, and Si and Fe which are inevitable impurity elements in the common aluminum-copper alloy smelting process.
In the invention, the diameter of the high-strength aluminum-copper alloy additive manufacturing special wire is preferably 0.8-1.6 mm, more preferably 0.8mm, 1.0mm, 1.2mm or 1.6mm, and most preferably 1.2 mm.
The invention provides a preparation method of the high-strength aluminum-copper alloy additive manufacturing special wire material, which comprises the following steps:
mixing raw materials corresponding to the chemical components, and sequentially smelting and casting to obtain a cast ingot;
carrying out homogenization treatment and hot extrusion on the cast ingot in sequence to obtain an extruded material;
and drawing the extruded material to obtain the high-strength wire special for the additive manufacturing of the aluminum-copper alloy.
In the present invention, unless otherwise specified, all the starting materials required for the preparation are commercially available products well known to those skilled in the art.
The method mixes the raw materials of the corresponding chemical components, and sequentially carries out smelting and casting to obtain the cast ingot. In the invention, the raw materials preferably comprise an aluminum-copper intermediate alloy, an aluminum-manganese intermediate alloy, an aluminum-zirconium intermediate alloy, an aluminum-titanium intermediate alloy and a pure aluminum preparation alloy; the aluminum-copper master alloy preferably comprises an Al-50Cu alloy, the aluminum-manganese master alloy preferably comprises an Al-10Mn alloy, the aluminum-zirconium master alloy preferably comprises an Al-10Zr alloy, and the aluminum-titanium master alloy preferably comprises an Al-10Ti alloy; the pure aluminum prepared alloy is preferably a commercial product with the purity of more than or equal to 99.99 percent. In the preparation process of the invention, the loss of metal elements in the raw material alloy is negligible. The method has no special requirement on the mode of mixing the raw materials, and the raw materials can be uniformly mixed by adopting a mode which is well known by the technical personnel in the field.
In the invention, the smelting preferably comprises primary smelting and refining which are sequentially carried out, wherein the temperature of the primary smelting is preferably 750-760 ℃, more preferably 752-758 ℃, and most preferably 755-758 ℃; the time for primary smelting is preferably 30-35 min, more preferably 31-34 min, and most preferably 32-33 min. In the present invention, the primary smelting is preferably carried out in a well-type electric furnace, more preferably a well-type electric furnace equipped with a graphite crucible.
And obtaining a smelting liquid after the primary smelting is finished, preferably refining the smelting liquid to obtain a casting liquid. In the invention, the refining temperature is preferably 760-780 ℃, and more preferably 768-772 ℃; the refining time is preferably 10-20 min, and more preferably 12-15 min.
In the present invention, the refining agent used for the refining is preferably an AJ-based refining agent, more preferably ZS-AJ 01C; the addition amount of the refining agent is preferably 0.10-0.20% by mass of the smelting liquid, and more preferably 0.13-0.16% by mass of the smelting liquid. In the present invention, the refining is preferably performed under a static condition. In the invention, the slag-removing agent (deslagging and dehydrogenation) used for refining is preferably hexachloroethane; the amount of the slag former is preferably 0.20-0.30% by mass of the smelting solution, more preferably 0.23-0.26% by mass of the smelting solution, and most preferably 0.25% by mass of the smelting solution. In the invention, the refining process is preferably to add a refining agent into the molten metal for refining, and then add a slag removing agent into the obtained molten metal for removing slag to obtain a casting liquid.
After the refining is finished, the casting liquid obtained by refining is preferably cast to obtain a cast ingot. In the invention, the casting temperature is preferably 720-740 ℃, and more preferably 725-735 ℃. Before the casting, the casting mould is preferably preheated, and the preheating temperature is preferably 180-230 ℃, and more preferably 190-210 ℃. The present invention has no particular requirements for the casting mold and the casting process, and the mold and the process known to those skilled in the art may be used.
After the ingot is obtained, the ingot is subjected to homogenization treatment and hot extrusion in sequence to obtain an extruded material. In the invention, the homogenization treatment temperature is preferably 520-550 ℃, more preferably 523-548 ℃, and most preferably 525-545 ℃; the heat preservation time of the homogenization treatment is preferably 14-17 hours, more preferably 15-17 hours, and most preferably 15-16 hours. The process of the homogenization treatment is not particularly required by the present invention, and processes well known to those skilled in the art can be used. The invention carries out homogenization treatment on the cast ingot, can eliminate or reduce the problem of uneven intra-crystal components under the crystallization condition, and improves the processing performance of the material.
In the invention, the temperature of the hot extrusion is preferably 380-430 ℃, more preferably 385-425 ℃, and most preferably 390-420 ℃; the time of the hot extrusion is preferably 1 to 2 hours, more preferably 1.2 to 1.8 hours, and most preferably 1.3 to 1.6 hours. In the hot extrusion process, the deformation coefficient is calculated by the ratio of the cross section area before extrusion to the cross section area after extrusion, and the deformation coefficient of the extrusion material is preferably 10 to 50, more preferably 10 to 20, still more preferably 11 to 19, and most preferably 12 to 18. In the present invention, the diameter of the extruded material is preferably 6 to 8mm, more preferably 6.5 to 8mm, and most preferably 6.5 to 7.5 mm. The apparatus and process for hot extrusion are not particularly limited in the present invention, and those well known to those skilled in the art may be used.
After the extruded material is obtained, the invention draws the extruded material to obtain the high-strength wire special for the additive manufacturing of the aluminum-copper alloy. In the invention, the drawing mode is preferably multi-pass drawing, and the drawing times are preferably 10 to 20 times, more preferably 12 to 18 times, and most preferably 14 to 16 times; the drawing method of the invention has no special requirements on the specific implementation mode of drawing, and the drawing method known by the technical personnel in the field can be adopted to obtain the wire with the target size. In the drawing process, the diameter of the cross section of the wire material is preferably reduced by 15-20% after each drawing, and annealing is preferably performed after each two-time drawing; the temperature of each annealing is preferably 380-430 ℃, more preferably 385-428 ℃, and most preferably 387-425 ℃; the heat preservation time of the annealing is preferably 1-2 hours independently, more preferably 1.2-1.8 hours, and most preferably 1.3-1.7 hours.
After the drawing is finished, the invention preferably carries out mechanical scraping on the material obtained after the drawing so as to remove burrs on the surface of the welding wire and optimize the surface appearance of the welding wire; after mechanical scraping, the mechanically scraped material is cleaned and polished, and the cleaning mode preferably comprises ultrasonic cleaning; the method of polishing preferably comprises chemical polishing. The present invention does not require special embodiments for the mechanical scraping, ultrasonic cleaning and chemical polishing, and may be practiced in a manner well known to those skilled in the art.
The invention provides application of the special wire for additive manufacturing of the high-strength aluminum-copper alloy in the technical scheme in the additive manufacturing of the high-strength aluminum-copper alloy through electric arcs. In the present invention, the method of arc additive manufacturing preferably comprises TIG additive manufacturing, MIG additive manufacturing or CMT additive manufacturing. The method for using the special wire for additive manufacturing of the high-strength aluminum-copper alloy in the electric arc additive manufacturing of the high-strength aluminum-copper alloy is not particularly limited, and a method known by a person skilled in the art can be selected.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples 1 to 3
Three wires with different component contents are respectively prepared according to the chemical components recorded in the table 1, and the specific preparation steps are as follows:
preparing an alloy by using Al-50Cu, Al-10Mn, Al-10Zr, Al-10Ti intermediate alloy and pure aluminum with the purity of 99.99 percent, and smelting in a graphite crucible in a well type electric furnace, wherein the primary smelting temperature is 755 ℃, and preserving the heat for 35min to obtain a smelting liquid; adding a ZS-AJ01C refining agent into the smelting liquid, wherein the addition amount of the refining agent accounts for 0.15% of the mass of the smelting liquid, refining at 770 ℃ for 16min, and then adding hexachloroethane into the obtained melt for slagging (the use amount of the slagging agent accounts for 0.25% of the mass of the smelting liquid), so as to obtain a casting liquid; pouring the casting liquid into a preheated iron mold at 720 ℃ to form an ingot, wherein the preheating temperature of the iron mold is 200 ℃; homogenizing the cast ingot at 535 ℃ for 16h, and carrying out hot extrusion on the obtained material at 400 ℃ for 1.5h to obtain the material with the diameter of
The extruded material is subjected to drawing and mechanical scraping for 16 times, the diameter of the cross section of the wire material is reduced by 15% after each drawing in the drawing process, and annealing is performed once after each two times of drawing; the temperature of each annealing is 400 ℃ independently, the holding time of each annealing is 1.5h independently, and the diameter is obtained
Finally, ultrasonic cleaning and chemical polishing are carried out on the wire material to obtain the high-strength wire material special for the additive manufacturing of the aluminum-copper alloy.
Comparative example
By taking a traditional ER2319 wire as a comparison, the specific chemical compositions of the ER2319 wire are shown in Table 1.
TABLE 1 chemical composition (% by weight) of wire prepared in examples 1 to 3, conventional wire of comparative example and substrate
Performance testing
TIG additive manufacturing was performed on three high-strength aluminum-copper alloy additive manufacturing dedicated wires prepared in examples 1 to 3 and a conventional wire ER2319 of a comparative example, and argon gas having a purity of 99.99% was used as a shielding gas, wherein the chemical compositions of substrates used were as shown in Table 1. When TIG material increase is carried out, the current for the base layer is 150A, then the material increase is carried out by using 120A current, the welding speed is 0.12m/min, the wire feeding speed is 0.58m/min, and the gas flow is 20L/min. The diameter of the tungsten electrode is 2mm, the extension length of the tungsten electrode is 2-3 mm during welding, and the distance between the tungsten electrode and the substrate is 2.5-3.5 mm.
The tensile test was carried out according to the method described in GB2651-89 "tensile test method for welded joints", in which the tensile rate was 1.2mm/min, the sampling position of the tensile specimen is shown in fig. 1, and the mechanical properties of the additive molded article in each direction are shown in tables 2 and 3.
Table 2 mechanical properties of the special wire prepared in examples 1-3 and the traditional wire additive-formed part of the comparative example in the height direction
Table 3 mechanical properties of special wire prepared in examples 1-3 and traditional wire additive-formed part prepared in comparative example in parallel direction
As can be seen from tables 2 and 3, the mechanical properties and the shaping of the additive-formed part obtained by additive-manufacturing the special wire material are obviously superior to those of the conventional comparative wire material ER 2319. Meanwhile, the mechanical property difference of the additive manufactured molded piece prepared by the wire material is obviously superior to that of the traditional wire material ER2319 in all directions.
According to the embodiment, the special wire for high-strength aluminum-copper alloy additive manufacturing, the preparation method and the application thereof are provided, and compared with the traditional wire, the interlayer structure of the additive manufactured molded part prepared from the special wire is uniform, the difference is smaller, and the mechanical property is good.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A special wire for additive manufacturing of high-strength aluminum-copper series alloy comprises the following chemical components in percentage by mass: 6.55% of Cu, 0.33% of Mn, 0.34% of Ti, 0.35% of Zr, 0.04% of Si, 0.02% of Fe and the balance of Al;
the preparation method of the special wire for the additive manufacturing of the high-strength aluminum-copper alloy comprises the following steps:
preparing an alloy by using Al-50Cu, Al-10Mn, Al-10Zr, Al-10Ti intermediate alloy and pure aluminum with the purity of 99.99 percent, and smelting in a graphite crucible in a well type electric furnace, wherein the primary smelting temperature is 755 ℃, and preserving the heat for 35min to obtain a smelting liquid; adding a ZS-AJ01C refining agent into the smelting liquid, wherein the addition amount of the refining agent accounts for 0.15% of the mass of the smelting liquid, refining at 770 ℃ for 16min, then adding hexachloroethane into the obtained melt for slagging, and the use amount of the slagging agent accounts for 0.25% of the mass of the smelting liquid, thus obtaining a casting liquid; pouring the casting liquid into a preheated iron mold at 720 ℃ to form an ingot, wherein the preheating temperature of the iron mold is 200 ℃; homogenizing the cast ingot at 535 ℃ for 16h, carrying out hot extrusion on the obtained material at 400 ℃ for 1.5h to obtain an extruded material with the diameter of phi 8mm, then carrying out drawing and mechanical scraping on the extruded material for 16 times, wherein in the drawing process, the diameter of the section of the wire material is reduced by 15% after each drawing, and annealing is carried out after each drawing; the temperature of each annealing is 400 ℃ independently, the heat preservation time of each annealing is 1.5h independently, a wire with the diameter of phi 1.2mm is obtained, and finally the special wire for the high-strength aluminum-copper alloy additive manufacturing is obtained through ultrasonic cleaning and chemical polishing.
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| RU2447174C1 (en) * | 2011-04-05 | 2012-04-10 | Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) | Aluminium-based cast alloy |
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| CN105779831A (en) * | 2016-05-25 | 2016-07-20 | 桂林航天工业学院 | Aluminum alloy welding wire for aerospace and preparation method of aluminum alloy welding wire for aerospace |
| CN108866407A (en) * | 2018-07-19 | 2018-11-23 | 东北轻合金有限责任公司 | A kind of big specification rectangle ingot of aerospace aluminium alloy and its manufacturing method |
| CN109128572A (en) * | 2018-10-10 | 2019-01-04 | 南昌航空大学 | A kind of aluminium copper welding wire and its preparation method and application |
| CN109266926A (en) * | 2018-11-19 | 2019-01-25 | 首都航天机械有限公司 | A kind of made of Al-Cu alloy silk and its preparation method and application |
| CN110284086A (en) * | 2019-07-29 | 2019-09-27 | 中国船舶重工集团公司第十二研究所 | A method of it eliminates and crystallizes phase segregation in casting Al-Cu manganese alloy |
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